1 files changed, 2 insertions, 2 deletions
diff --git a/untangle.c b/untangle.c
index 34924ae..cd1762f 100644
--- a/untangle.c
+++ b/untangle.c
@@ -444,8 +444,8 @@ typedef struct vertex {
 
 static int vertcmpC(const void *av, const void *bv)
 {
-    const vertex *a = (vertex *)av;
-    const vertex *b = (vertex *)bv;
+    const vertex *a = (const vertex *)av;
+    const vertex *b = (const vertex *)bv;
 
     if (a->param < b->param)
 	return -1;